If because of special circumstances applicable to subject property due to size, shape, topography, location or surroundings, the strict application of this title is found to deprive subject property of rights and/or privileges enjoyed by other properties in the vicinity and under identical zone classification, the board may grant a variance in harmony with the general purpose and intent of this title. Such variance may vary the literal enforcement of any standard, requirement or regulation of this title relating to the density, off-street parking or loading, but not the use provisions of the district wherein the property is located. To this end, a variance in the provisions and requirements of this title shall only be authorized if the hearing examiner finds that all the following facts and conditions exist in each case of a request for a special exception by an application for a variance:
1. That there are exceptional or extraordinary circumstances or conditions applying to the subject property that do not apply generally to other properties in the same vicinity or zoning district, and that the plight of the applicant is unique and not the result of his own action;
2. That the land or structure in question cannot be reasonably used and cannot yield a reasonable return if used only in accordance with the density requirements of this title for the district in which it is located, and that such variance is necessary for the preservation and enjoyment of a substantial property right of the applicant possessed by the owners of other property in the same vicinity or district;
3. That the authorization of such variance will not be materially detrimental to the public welfare, not injurious to nearby property, nor essentially different from the provisions of the district in which it is located;
4. That the granting of such variance will not adversely affect the comprehensive plan or studies thereof.